effect of adding attributes to infoobjects

Hi Gurus,

I wanted to add 2 new attributes and convert 3/4 display attributes to Nav attributes of the info object 0DOC_NUMBER. Now, 0DOC_NUMBER is used already in different active data targets.......if 1 do the enhancement of 0DOC_NUMBEr, what will be the effect on the data targets which contain it???do i have to do something , like reactivation of the update rules or something to ensure that the enhancement does not have any effect on the data target????

Southie